US1776794A - Typewriting machine - Google Patents

Description

Sept. 30, 1930. MYERS 1,776,794

TYPEWRITING MACHINE Filed Jan. 6, 1928 2 Sheets-Sheet 1 1 I b. era

Sept. 30, 1930. c. MYERS TYPEWRITING MACHINE Filed Jan. 6. 1928 2 Sheets$haet 2 Patented Sept. 30, 1.930

UNITED STATES- PATENT OFFICE LEWIS C. MYERS, OF FREEPORT, NEW YORK, ASSIGNOR T0 ROYAL TYPEWRITER COM- PANY, INQ, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK TYPEWRITING MACHINE Application filed January s, 1928. Serial No. 244,915.

The invention disclosed in this application relates to a new type action particularly- I typewriter. Each type bar carries a plurality of groups of type and is controlled by a plurality of key levers. One key merely imparts a sliding movement to the type bar to the printing point to print from one type of a group, while the other key lever in addition to this movement also imparts a tilting movement to the type bar in order to print from the corresponding type of the other group. The desired t pe of the group is selected by shifting the p aten in a desired manner.

The whole type action with the exception of the key levers is supported by a single member which is mounted in the frame of the machine so that it may be adjusted in two directions at substantially right angles to each other. Since the type action includes toggle mechanism which iszmoved to a substantially straight line at the moment of printing, it is necessary that the type bars be positioned a proper distance from theplaten and the adustment of the supporting member in one direction is designed to attain this result. Adjustment of the supporting member in the other direction is for the purpose of positioning the type bar so that a full clear imprint of the type will be made upon the platen.

Various detail features of the invention will be apparent from the following description and the appended claims.

In the drawings:

Figur 1 is a side elevation of a single type action with parts in section showing the normal position of the type bar in full lines and the printing position in dotted lines. when the type bar is actuated by one of the two keys which control the same.

Figure 2 is a vertical side elevation of the same mechanism when the other of the two keys is depressed, showing the position of the parts in the early portion of the depression of the key.

Figure 3 is a view similar to Figure 1 showing the parts inthe position which they oc- Figure 4 is a disassembled View of a portionof the type action.

Figure 5 is a section on the line 5-5 of Figure 1.'

Each type action is supported by a frame member 1 which is somewhat L-shaped and the lower rear portion 2 thereof passes through an opening in a block 3 adapted to be supported on the frame member said opening being larger than the portion 2 so that the vertical position of this rear portiom2 may be adjusted by means of upper and lower screws 4 and 5 threaded into the block 3 and engaging the part 2 at their ends. Obviously by appropriate movement of these two screws the vertical position of this end of the frame member 1 may bevaried. The other end of the frame member is provided with a forwardly projecting horizontal portion 6 which passes through a cut out 7 in a frame member 8, this cut out being provided with a rounded or convexed bottom. Each two adjacent parts 6 are retained in position by a plate 9 fastened to the frame member 8 by means of a screw 10 and provided with rounded or convexed end portions 11 which overlie the portions 6.

either of the screws 4 or 5 a fore and aft adjustment of the'frame member 1 with relation to the platen A may be obtained.

The rear portionof. the frame member 1 is provided with a vertical extension 12 to which a type bar supporting and guiding member 13 is pivoted at 14:. Fastened to this member in any desired manner is a vertical plate 15 to the upper edge of which is fastened a bar 16 having a curved edge which overlies the top of the type bar 17 and guides the same in itssliding movement.

Pivoted at 18 to the typebar is a double link 19 preferably connected by a web 20. It is obvious that this web may be omitted and that even a single link may be employed instead of a double link. The front end of the link 19 is pivoted at 21 to a short link 22 which in turn is pivoted at 22' to the supporting member 1. Pivoted at 23 to an ear of the link 22 is one end of a short link 24, the other end of which is pivoted at 25 to two arms 26 forming a lever, the lower ends of which are pivoted at 27 to supporting member 1. These two arms 26 lie on opposite sides of the supporting member 1.

Each type bar in its movement toward the platen A is controlled by two keys and C. The key B is returned to normal position by spring 28 and the key C by a spring 29, both springs being fastened to the supporting member 1. When either of the keys is de pressed it operates a member 30 which brings into operation power mechanism such as shown in the patent to Dorsey, 1,628,037, of May 10, 1927. This power mechanism includes a constantly rotating part D, but it has been deemed unnecessary to describe this mechanism in detail since in itself it forms no member 1 and having at the end of its other arm an offset which lies in front of one of thedever arms 26. It is therefore obvious that. if the key lever B is depressed a downward pull will be exerted on the link 31, the bell crank lever 34 will be rocked, and the type action will be moved from the full line to the dotted line position of Figure 1 thus printing from the upper type a of the upper group on the type bar. a spring 36 attached at one end to a lever arm 26 and at its other .end to an arm 37 on the supporting member 1 will return the action to normal position immediately upon disconnection of the power drive.

,ward pull is exerted on the link 32 a further result Will be obtained since this link is 'connected at its upper end at 38 to the long arm 41 of a bell crank lever 39 also fulcrumed on the pivot 27 and having at the end of its other arm a bent over ear 40 which lies in front of the other lever arm 26. A spring 39 connected to this bent over ear and to the arm 37 tends to return this bell crank lever to normal position. An operation of this bell crank lever 39 will move the type action to itsoperative position since theaction is the same regardless. of which lever arm 26 is operated. The rearwardly extending arm.41 of the bell crank lever 39 is provided with a pin 42 having a roller journaled thereon "which is adapted to contact with a cam edge 43 of the type bar supporting member 13.

Upon the first portion of the downward movement of the-link 32, this roller will contact with the cam edge 43 of the member 13 as shown in Figure 2. The cam edge 4.3 is so formed that the member 13 is iven its entire lifting movement during the rst part of the movement of the arm 41 while during the latter part of the movement of this arm, no movement is given to the member 13 because, the cam edge is then in an arc of a circle struck from the pivot 27 as its center. Upon the completion of the movement, the parts will occupy the position shown in Figure 3 in which the type bar carrier has been moved about the pivot 14 so that the printing is performed from the upper type c of the lower group of type on the type bar. It may be noted at this point that the types I) and d are brought into printing position when the platen is shifted by any usual case shift mechanism.

The type guiding and supporting member 13 is returned to the Figure 1 position by means of a spring 44 connected at one end to said member and at its other end to an ear 44 on the supporting member 1. A stop arm 45 on the member 13 normally contacts with a sound deadening stop 46 on the upward ex tension 12 of the member 1 and a similar stop arm 47 on the member 13 contacts with the same stop 46 when the member 13 is rocked to the Figure 3 position. The rear end 48 of the supporting member 13 is guided in a comb guide 49 which also assists in guiding the type bar. I 1

A resilient stop 50 is carried by the plate 15 and when the type bar is in normal position the edge 51 of a cut out portion contacts with said stop While when it is moved to operative position as shown in Figure 3 a similar curved edge 52 contacts with said stop. By means of such a sound deadening stop and the toggle mechanism practically all noise in the operation of the type action is avoided.

It will be apparent that the present construction comprises a very simple and efiicient type action, the whole of which is supported and guided by a single adjustable member mounted in the frame of the machine. It is also apparent that a very simple and efiicient cam mechanism is provided for printing a different type upon the depression of the second of the two keys. While in the present embodiment of the mechanism the keys select the groups and the type in the group are selected by the platen shift, nevertheless it is obvious that this relation may be reversed if desired. It is also apparent that many details of the precise construction can be varied without .in any way departing from guide for the same, a supporting member for' 'saidelements, and means for adjustably mounting said member in the machine frame at two widely separated points, one adjustment being toward and from the platen, and the other at substantially rightangles thereto.

2. In a typewriting machine, a plate-ma frame mounted for vertical and horizontal fixed adjustments relative to the platen, a type bar slidably mounted. on the frame, and means for operating said type bar.

3. In a typewriting machine, a platen, a frame mounted for fixed adjustments in a horizontal plane towardand from the platen, one end of, the frame being pivotally support-ed, a type bar mounted on said frame,

means cooperating with the other end of the frame for swinging said frame about the movements relative thereto, a type bar. slid- 1 pivoted end thereof to raise or lower the type bar relative to the platen, and means for operating the type bar.

4 4. In-a typewriting machine, a platen, a frame mounted for vertical and .horizontal adjustments relative to the platen, a type bar guide mounted on the frame for vertical ably mounted on said guide, two key levers as sociated with said type bar,means operative upon depression of either key lever for sliding the type bar to printing position against the platen, and other means operative upon depression of one key lever only for moving said guide vertically relative to the platen.

5. In a typewriting machine, a platen, a frame mounted for vertical and horizontal adjustments relative to the platen, a type bar guide pivoted on a horizontal axis on the frame, two'key levers associated with said type bar, means operative upon depression of either key lever for sliding the type bar to printing position against the platen, er means operative upon depression of one key lever only for tilting said guide about its horizontal axis.

6. In a typewriting machine, a platen, a frame mounted for bodily adjustments in a horizontal plane toward and from the platen, one end of the frame being pivotally supported, a type bar guide mounted on the frame for vertical movements relative thereto, means the other end of the frame for swinging said frame about the pivoted end thereof to raise or lower the type bar relative, to the platen, a type bar slidably mounted on said guide, two key levers associated with said type bar, means operative upon depression of either key lever for sliding the type bar to printing position against the platen, and other means operative upon depression of one'key lever only for moving said guide vertically relative to the platen.

7 In a typewriting machine, a platen, a frame mounted for bodily adjustments in a horizontal plane toward and from the platen, one end of the frame being pivotally supand oth-- ported, a type bar guide pivoted on a hori 'of to raise or lower the type bar relative to the platen, a type bar slidably mounted on said guide, two key levers associated with said type bar, means operative upon depression of either key lever for sliding the type bar to printing position against the platen, and other means operative upon depression of one key lever only for tilting said guide about its horizontal axis.

8. In a typewriting machine, a platen, a frame mounted for vertical and horizontal adjustments relative to the platen, a type bar guide pivoted on a horizontal axis on the frame, two key levers associated with said type bar, means operative upon depression of either key lever for sliding the type bar to printing position against the platen, said guide being provided with a cam surface, an actuating lever pivoted to the frame and engageable with said cam surface, and means operative upon depresison of one key lever only for moving the actuating lever along the cam surface of the guide for tilting said guide about its axis and thereby move the type bar vertically relative to the platen.

9. In a typewriting machine, a platen, a frame mounted for vertical and horizontal adjustments relative to the platen, a type barpivotal movements of the gulde, and a spring for returning said guide to its initial position.

10. In a typewriting machine, a platen, a frame mounted forvertical and horizontal adjustments relative to the platen, a type bar guide pivoted on a horizontal axis on the frame, two key levers associated with said type bar, means operative upon depression of either key lever for sliding the type bar to printng position against the platen, said guide being provided with a cam surface, an actuatinglever pivoted to the frame and engageable with said cam surface, and means operative upon depression of one key lever only for moving the actuating lever along-the cam surface of the guide for tilting said guide about its axis and thereby move the type bar vertically relative to the platen, and 'a spring connected to the frame and to the actuating lever for returning the latter to its initial position.

1 1. In a typewriting machine, a platen, a. frame mounted in front of the platen for vertical adjustments relative to the platen and for horizontal adjustments towards and from said platen, atype bar mounted on the frame,

' and means for operating the type bar.

12. In a typewriting machine, a platen, a

frame mounted in front of the platen for vertical adjustments relative to the platen and for horizontal adjustments towards and from said platen, a type bar mountedon the frame, and means including an operating lever rfulcrumed on said frame for operating the type bar. 4

In testimony whereof, I have hereunto subscribed my name.

LEWIS G. MYERS.

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